org.nustaq.kson.KsonStringCharInput Maven / Gradle / Ivy
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A fast java serialization drop in-replacement and some serialization based utils such as Structs and OffHeap Memory.
/*
* Copyright 2014 Ruediger Moeller.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.nustaq.kson;
import java.util.Stack;
/**
* implementation of char input on top of a String
*/
public class KsonStringCharInput implements KsonCharInput {
CharSequence s;
int pos;
int end;
Stack stack;
public KsonStringCharInput(CharSequence s) {
this.s = s;
pos = 0;
end = s.length();
}
public KsonStringCharInput(String s, int pos, int len) {
this.s = s;
this.pos = pos;
this.end = pos+len;
}
/**
* @return char or -1 for eof
*/
@Override
public int readChar() {
if ( pos >= end )
return -1;
return s.charAt(pos++);
}
@Override
public int peekChar() {
if ( pos >= end )
return -1;
return s.charAt(pos);
}
@Override
public int position() {
return pos;
}
@Override
public int back(int num) {
pos -= num; return pos;
}
@Override
public boolean isEof() {
return pos >= s.length();
}
@Override
public String getString(int pos, int length) {
return s.subSequence(Math.max(0,pos),Math.min(s.length(),pos+length)).toString();
}
}
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